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MVC : How to add attribute, class, readonly, custom attribute to @Html helper classes in MVC like @Html.TextBoxFor

Here I am using the examples for @Html.TextBoxFor class.

1) Adding attributes
@Html.TextBoxFor(model=>model.FirstName,new{ Width="200px" })

2) Adding Custom attribute
@Html.TextBoxFor(model=>model.FirstName,new{ @data_type="number" })
Note : data_type will be converted to data-type by Razor engine.

3) Readonly & Class
@Html.TextBoxFor(model=>model.FirstName,new{ @readonly="readonly", @class="firstname" })

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